For your Cisco SPA921, SPA922, SPA941, SPA942 or SPA962 phone (formerly Linksys), simply select any Plantronics H-series headset (click below) along with the special 2.5mm shielded connector cable (part# 64279-02, also referred to as 48586-03) below. No external amplifier base needed. If you prefer a longer cable, choose the long cord below rather than the shorter one, for increased mobility at your desk area.